Sweet potato dehydrating
Hay dryers
Soybean dryers
Peanut dryers (peanuts in shell) Corn dryers
Tobacco dryers

Dissipating steam vapors
Make-up air systems
Space heating
Sterilizing with hot air (other than cotton seed sterilizing)

Under fired tanks for kettles
Tanks or kettles fired with immersion tubes

“Peel” ovens: direct and indirect brick-set types; portable sheet metal types
Continuous “band” ovens (including long horizontal “traveler” types)
Rotary hearth ovens
“Traveller” overns (close-coupled type, including small reel types)
Vertical reel type ovens

Fire Tube Boilers
HRT boilers with long or short firebox or settings Scotch marine boilers
Package boilers
Oil fields or locomotive-type boilers
Vertical fire tube boilers – large (usually waste heat)
Cast iron sectional boilers
Small vertical boilers (pressing and cleaners, etc.)
Special pilot and safety device arrangements

Box type kiln (flower pots, etc.)
Continuous kilns (including tunnel and progressive kilns)
Dry kilns for brick or tile

Other than ore thawing

Pottery kilns
Decorative tile kilns
Pottery mould drying

Reverberatory furnaces

Drawer type core ovens
Car and rack type core ovens
Continuous core ovens (vertical type)
Shell mould drying ovens

Cotton seed sterilizers

Deep fat kettles fired with immersion tubes, and immersion tubes and recirculation

Die casting pots (including “goose-neck”heaters)
Moulding pots for die casting
Patented die casting machines

Chicken singeing
Armature baking ovens (including coils, windings, etc.)
Soldering by direct flame
Burn-off paint and other combustibles (from conveyer fixtures, scrap metal, etc.)
“Flame curtain” burners for doors of furnaces(usually large)

Armature baking ovens (including coils, windings, etc.)
Asphalt drying (after coating pipe, roofing paper, etc.)
Candy drying (including candy corn)
Carbon baking
Cement block or cinder block curing rooms Chemical dryers or dehydrators (including heavy industrial chemicals)
Coating drying inside vessels (including brewery vats, tank cars, etc.)
Cork products drying
Felt products drying (hats, etc.)
Gasket curing ovens (including brake linings) Line baking on wires or rods
Lumber drying kilns
Leather drying or curing
Melting kilns and malt ovens
Pecan dryers
Pharmaceutical drying (including fine chemicals) Plastic curing ovens
Rubber products curing
Salt dryers and evaporators
Sludge dehydration (brewery slops, sewage waste, etc.)

Barrel and drum drying
Leather drying
Metal parts drying in box-type, conveyor, tumbler, or rotary ovens
Rug and carpet drying
Laundry dryers

Powdered eggs, coffee and milk dryers

Drying floor moulds with air heaters and direct firing

Continuous furnaces (usually fired with recirculating air heater)

Standard box-type forge furnaces
End-heating box-type forge furnaces (including brass drum furnaces, over-and-under fired slot forges and others that have no hearth)
Rotary hearth forge furnaces
High-temperature welding forges (2800 degrees and up)
Ingot forges for heating single large ingots Continuous pusher-type or walking beam forge furnaces
“Drag” furnaces
Small utility forges (including smith’s forges)
Rivet forges

Galvanizing kettles (all types)

Day tanks
Continuous direct-fired tanks, non-regenerative“Deep-eye” pot furnaces
Standby oil burners on regenerative furnaces (including revolving pots)
Continuous direct-fired regenerative
Feeders and forehearths (including fiberglass“noses”)
Special reverberatory furnaces

Annealing lehrs
Decorating lehrs
Plate glass or window glass lehrs

Continuous glazing or fire polishing
Glory holes
Mould preheating ovens
Glass wool curing ovens (including fiberglass curing)
Glass bending

Rice dryers
Corn and seed dryers: tower, rotary drum and small portable types

All types of continuous ovens for drying gypsum, fiberboard shingles, etc.)

Oven or box type furnaces
Continuous annealing or normalizing furnaces Alloy link-belt or wire-belt conveyor-type furnaces for lighter products
Roller-hearth, walking beam, or pusher-type furnaces for heavier products
Car-type annealing or normalizing furnaces used in forge plants, foundaries and steel mills, and for malleable annealing, curbizing for cycle annealing, speheroidizing and homogenizing of large parts
Lead hardening parts and salt baths (including cyanide)
Molten lead, cyanide, or special salts heated in iron, steel, or alloy pots
Rapid-heating-before-quenching or miscellaneous steel parts to carburize and/or harden surface of parts after machining
Wire patenting
Incinerators
Crematories
Fume and smoke incinerators